381070385 has 8 divisors (see below), whose sum is σ = 484183656. Its totient is φ = 286923520.

The previous prime is 381070381. The next prime is 381070397. The reversal of 381070385 is 583070183.

It can be written as a sum of positive squares in 4 ways, for example, as 19918369 + 361152016 = 4463^2 + 19004^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 381070385 - 2² = 381070381 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381070381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2241506 + ... + 2241675.

It is an arithmetic number, because the mean of its divisors is an integer number (60522957).

Almost surely, 2^381070385 is an apocalyptic number.

It is an amenable number.

381070385 is a deficient number, since it is larger than the sum of its proper divisors (103113271).

381070385 is a wasteful number, since it uses less digits than its factorization.

381070385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483203.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 381070385 is about 19521.0241790742. The cubic root of 381070385 is about 724.9950915244.

The spelling of 381070385 in words is "three hundred eighty-one million, seventy thousand, three hundred eighty-five".